I think it's all subjective. I have met PLENTY of idiotic women out there. I have a friend that is 29 years old. She acts like she's 16 (parties every day, works at a liquor store, smokes pot 24/7, sleeps til noon etc.), and it makes me want to not associate with her. It's kind of embarrassing. In her defense, she's miserable, and is trying to find herself, but she doesn't change a thing about her lifestyle.
I met my ex when she was 17, and I figured she was 22 by her demeanor. She was goal-oriented, had worked since she was 16, independent, going to school etc. She was motivated, and knew what she wanted. She had that drive the entire time, and it was one of the most attractive things about her (that, coupled with the fact that she was bangin' as hell, cooked amazing, and spoiled me rotten
). We fueled each other to better ourselves. I'm finding more and more that it's rare to find girls that are truly motivated to push themselves as far as they can.